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Some methodological problems concerning nonisothermal kinetic analysis of heterogeneous solid–gas reactions

✍ Scribed by P. Budrugeac; E. Segal

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 193 KB
Volume: 33
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.1052

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✦ Synopsis

Abstract

Isoconversional methods, those using only one curve α = α(T) (α is the conversion degree and T is the temperature), and invariant kinetic parameter method were applied to estimate the kinetic parameters from the following nonisothermal data: (1) simulated TG curves for a single reaction; (2) TG curves for thermal degradation of PVC; and (3) TG curves for the dehydration of CaC~2~O~4~·H~2~O. The results obtained by applying various methods for the same system are compared and discussed. Finally, a procedure of kinetic analysis is suggested. Its application could lead to kinetic parameter values that can be used to predict either α = α(t) curves for other heating rates or α = α(T) curves for isothermal conditions. © 2001 John Wiley & Sons, Inc. Int J chem Kinet 33: 564–573, 2001

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Some confusion concerning integral isoco

Some confusion concerning integral isoconversional methods that may result from the paper by Budrugeac and Segal “Some Methodological Problems Concerning Nonisothermal Kinetic Analysis of Heterogeneous Solid–Gas Reactions”

✍ Sergey Vyazovkin 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 100 KB

## Abstract Budrugeac and Segal (__Int. J. Chem. Kinet.__ **33**, 564, 2001) have generally criticized the integral isoconversional methods for producing a systematic error in the activation energy, whose value varies with the extent of conversion. We stress that this error is practically eliminate